Attraction to Children by Rüdiger Lautmann. 74 pages in English, published in 1994 as Die Lust am Kind.

Sexual desire for children is not something that can be easily put into words, either by the researcher or his pedophile conversational partner. The prominence and indeed dominance of the abuse concept makes our undertaking seem almost a sacrilege. And yet, this is not at all a question of supporting any of my own pet theories; rather, I am concerned with the narrow question: What do pedophiles see in children? The imposing literature on the subject makes even asking this question difficult, if not impossible